Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.

No definition available.

Name:	dei_AmendmentFlag
Namespace Prefix:	dei_
Data Type:	xbrli:booleanItemType
Balance Type:	na
Period Type:	duration

- Definition

PCAOB issued Audit Firm Identifier

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form 10-K
-Number 249
-Section 310

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form 20-F
-Number 249
-Section 220
-Subsection f

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form 40-F
-Number 249
-Section 240
-Subsection f

Document and Entity Information - USD ($)	12 Months Ended
Document and Entity Information - USD ($)	Sep. 30, 2025	Nov. 19, 2025	Mar. 31, 2025
Document Information [Line Items]
Entity Registrant Name	PTC Inc.
Document Type	10-K
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Sep. 30, 2025
Current Fiscal Year End Date	--09-30
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	FY
Entity Incorporation, State or Country Code	MA
Entity Tax Identification Number	04-2866152
Title of 12(b) Security	Common Stock, $.01 par value per share
Trading Symbol	PTC
Security Exchange Name	NASDAQ
Entity File Number	0-18059
Amendment Flag	false
Entity Central Index Key	0000857005
Entity Filer Category	Large Accelerated Filer
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction [Flag]	false
Entity Small Business	false
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Shell Company	false
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Address, Address Line One	121 Seaport Boulevard
Entity Address, City or Town	Boston
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	02210
City Area Code	781
Local Phone Number	370-5000
Entity Public Float			$ 18,551,172,440
Entity Emerging Growth Company	false
Documents Incorporated by Reference	Portions of the definitive Proxy Statement in connection with the 2026 Annual Meeting of Shareholders (2026 Proxy Statement) are incorporated by reference into Part III.
Auditor Name	PricewaterhouseCoopers LLP
Auditor Firm ID	238
Auditor Location	Boston, Massachusetts
Auditor Opinion [Text Block]	We have audited the accompanying consolidated balance sheets of PTC Inc. and its subsidiaries (the "Company") as of September 30, 2025 and 2024, and the related consolidated statements of operations, of comprehensive income, of stockholders’ equity and of cash flows for each of the three years in the period ended September 30, 2025, including the related notes (collectively referred to as the "consolidated financial statements"). We also have audited the Company's internal control over financial reporting as of September 30, 2025, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the financial position of the Company as of September 30, 2025 and 2024, and the results of its operations and its cash flows for each of the three years in the period ended September 30, 2025 in conformity with accounting principles generally accepted in the United States of America. Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of September 30, 2025, based on criteria established in Internal Control - Integrated Framework (2013) issued by the COSO.
Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding	119,925,951	119,448,261